package com.xuehu.cloud.service.impl;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import com.xuehu.cloud.service.PaymentService;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * @author guoweia@cslc.com.cn
 * @createTime 2020/12/1 16:06
 * @description
 */
@Service
public class PaymentServiceImpl implements PaymentService {
    @Override
    public String paymentOk(Long id) {
        try {
            TimeUnit.SECONDS.sleep(10);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + ", paymentOk:" + id + ",哈哈O(∩_∩)O";
    }


    @Override
    @HystrixCommand(fallbackMethod = "paymentTimeoutFallback"
            ,commandProperties = {@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")}
            )
    public String paymentTimeout(Long id) {
//        int n = 10/0;
        try {
            TimeUnit.SECONDS.sleep(10);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + ", paymentTimeout:" + id + ",q(≧▽≦q)";
    }

    public String paymentTimeoutFallback(Long id) {
        return "线程池：" + Thread.currentThread().getName() + ",系统繁忙,paymentTimeoutFallback成功，id=" + id;
    }

    //========================熔断器============
    @HystrixCommand(fallbackMethod = "paymentCircuitBreakerFallback",
        commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),//是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60")//失败率达到多少百分比后跳闸
        })
    public String paymentCircuitBreaker(@PathVariable("id")Long id) {
        if(id < 0) {
            throw new RuntimeException("******paymentCircuitBreaker::id不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return "paymentCircuitBreaker:" + Thread.currentThread().getName()+"调用成功，流水号: " + serialNumber;
    }

    public String paymentCircuitBreakerFallback(@PathVariable("id") Long id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " +id;
    }

}
